Machine for forming rubber tubes.



F. W. KRBMB-R. MACHINE FOR FORMING RUBBER TUBES.

\ APPLICATION FILED MAY 24, 1912.

1,078,099, Patented Nov. 11, 1913' 3 SHEETS-SHBBT l.

I 45 4%, if 5 a? 9 /2 7 5 I v 47 Z5 4/ 9 f 46 2/ .B I m I v A -3 I .55 4g /f 92 g /4 a Z m. lmenfc ol" Attorneys F: W. VMAOHINB FOR FORMING RUBBER TUBES.-

mum.

Patenteii NQV. 11, 1913.

' Attorneys P. W. 'KREMER.

MAGHINE FOR FORMING RUBBER TUBES APPLICATION FILED MAY 24. 1912 Patented Nov. 11, 1913.

3 SHEETS-SHEET 3.

Attorneys I lnvent or I I.

sirarns Pram (Eric.

MACHINE FOR EQRMING- RUBBER TUBES.

' Application filedliay 241, Serial 110.89.),495.

To all whom it may concern Be it known that'I, FRANKLIN W. Kent/inn,

I a citizen of the United States, "residing at Carlstadt, in the county of Bergen and State of New Jersey, have invented a new and useful Machine for Forming Rubber Tubes, of which the following is a specification.

The machine herein disclosed is adapted for the formation of rubber tubes of the sort commonly employed in the construction of vehicle tires.

In the device forming thesubject-Inatter of this application, a movable carrier is provided for advancing a thin sheet of mate rial against a floating mandrel, the mandrel preferably being yieldably'supported by the carrier, means beingprovided for advancing. the carrier and for simultaneously rotating the mandrel, so that when the mate rial is advanced against the mandrel, the

material will'be wound about the mandrel in a plurality of la ers, to form amulti-ply tube.

()ne object o the present invention is to provide a machine of-this type comprising a floating mandrel, so mounted that a perfect tube [Will be formed thereon, irrespective of irregularities in the outer surface of the mandrel. I

Another objectof the invention is to'provide novel mechanism in which the carrier constitutes a means for yieldablyc'support ing the mandrel.

A further object of the invention is to provide means whereby the tension of the carrier may be adju'sted, means being pr'ovided for varyingthe pressure of the mandrel upon the carrier, and for releasing the mandrel, so that the mandrel may be transported out of the machine by the carrier,

after the tube-forming process has, been cornpleted.

The invention aims to provide novel driving mechanism for advancing the carrier and -for rotatin the mandrel.

It is within the scope of the invention to provide a carrier anda mandrel, eiiect-ive by different atmospheric. pressure 'to cause the tube-forming material to adhere to the mandrel, so that the material may be. wound" around the mandrel, the carrier being operative to advance the material against the. mandrel, merely,-a retarding, suction-ac- Specification of Letters Patent;

tion between the material. and the carrier be ing avoided. K v

Withtheforegoing and other objects in View, which. will appear asthe description proceeds, the invention resides in the com-' bination and arrangement of parts and in the details of construction hereinafter described and claimed, it being. understood hat changes in the precise embodiment of invention herein disclosed can be made with r in the scope of What is claimed without departing from the spirit of the invention.

In the drawings,Figure 1 shows the invention. in side elevation; Fig. 2 is a longitudinal section; Fig. '3 is an end eleva- PatentedNomlLlQlSf.

tion; Fig; 4: is'a .top plan; Fig. 5 is a frag. I

mental section on the line 5--5 of Fig. i.

The structure herein disclosedcomprises, broadly speaking, a frame in which the movable'elements are journaled and upheld, a carrier and supporting mechanism therefor,

a floating mandrel and mandrel-controlling means, .and driving mechanism'fo'r advancng. the carrier and for rotat ng the mandrel. I vthe drawings, that end 0 the structure to which the character A is applied will be.

considered the forward end of the machine,

- that end of the machine to which the refer;

ence characterB is applied being considered the rear end of the machine, descriptive i termsbeing selected accordingly, in'definlng screws her the like. Journaled in the' bear ings 4 is ashaft '6 carrying aroller 7. Supported by the frame-1 adjacent th'e'rear end thereof are bearings 8, of which. there are .two pairs, one pair of the bearings 8 receiving a, shaft-- 9 and the other pair of bearings Sieceivirig a shaft 10; The shaft 9 is pro.-

Noting particularly Figs. 1 and 2 it will be seen that rack bars 14 are mounted .to'

slide vertically in the frame 1, the rack bars supporting a shaft 18 for rotatlon, the shaft carrying a roller-19. A shaft 14 1s journaled in the frame 1 and fixed to the shaft.

1 are pinions 14 meshing into the rack bars 14. Projecting from the shaft 14 is a lever- 14. carrying a pivotally mounted hanger 16.

supporting a plurality of individually removable weights 17. Trained about the rollers 7, 11, 12 and 19 is a web 20, hereinafter referred to as the carrier. The con stitucnt material of the web or carrier 20 "is amatter of. choice, but two considerations are to be borne in mind. First, the web 20 must be fashioned from such material that a. thin sheet of rubber will not adhere thereto; and secondly, the web 20 may be porous to permit the passage of air therethrough. With the foregoing in mind, the web 20 is ordinarily fashioned from felt.

, The floating mandrel and the mandrel controlling: mana-F ixed be and upstanding from the rear end of the frame '1 are standards 21 in which a shaft- 22 is jour-' naled. Secured to one end of the shaft 22 is a rearwardly projecting arm 23 to which is pivoted a hanger 24, supporting a film rality of individually removable weights25. Projecting forwardly from the shaft 22, and

, manually accessible from the forward end of the machine, is alever 26.

Arms 27 extend forwardly from the shaft 22 and overhang the rollers '11 and12, a shaft 28 being journaled in the arms 27. Secured to the shaft-28 is a roller QQ-wliich may be prcvided with a resilient facing 30. The roller 29 adapted to exert pressure upon a tubu' lar, floating mandrel. 31, about which is fashioned thetube'32." The mandrel 81 is supported, between the rollers 11 and 12',

by the yilda'ble carrier or web 20 and is cradled in a bi'ght of the carrier. The man- 'drel 31 isthussupported independentl of the rollers-11 and 12( The material rorn which the mandrel 31 is fashioned may be varied; However, the mandrel 31 is commonly' fashioned from metal and is imper meahle b air. The rim'ag 'mecfiantsm.Referring to "Fig. 4 and comparing the same'with Fig. 1,- it 18 to-be noted that a short drive shaft is journald insaddle bearings 34 secured to one side of the frame 1, the shaft being provided with a pulley 35 or with other suitable means whereby thev shaft may he actuated from a prime mover. Interposed'in. the shaft 33'isa clutchyin'dicated conventionaliy at 36 and controlled by e forwardly extended clutch lever .37. Secfi'red to the link 41 is mounted for 'upon the shaft 10, the lm 41 receiving roupon the ,material.

travels between the web 20 and the floating -.mandrel,31, the material will adhere closely inner end of the drive shaft 33 is a pinion 38 meshinginto a pinion 39 upon the shaft 9 and into a pinion 40-upo1'1 the shaft 10. -A

ivotal movement tatably a shaft 42 provided with a pinion 43. A link 44 connects the shaft 42 with the shaft 28, the extremity of the shaft 28 being provided with a pinion 45 which meshes into the pinion 43. The opposite end of the shaft 10 is provided -with a sprocket wheel 46 about which is trained a drive chain 47 engagin a sprocket wheel 48 upon the shaft 6, the drive chain 47 being trained about a sprocket wheel 49 upon the shaft 18.

Referringparticularly tolfigs. 1 and 2, a means is provided for adjusting the tension of the drive chain 47,'this means consisting of a lever 51 fulcrumed intermediate he ends upon the frame 1, the forward end of the lever 51 carrying a sprocket Wheel 52 which engages with the lower run of the drive chain 47. A screw is threaded into :1 lug 54 projecting from the frame 1,, and by manipulating the screw 58 the lever '51 may be tilted'for the obvious purpose of'adjusting the tension of the drive chain. 47 through the medium of the sprocket wheel 52.

Operatiom-A sheet of thin rubber, of much less thickness than the thickness of the wall of the finished tube is placed upon the web or carrier 20 at the forward end of the machine. carried rearwardly by the carrier 20, toward the floating mandrel 31, the web 20 exerting web or carrier 20 will not adhere 'or stick ,to the material, incidentally owing to the The sheet ofriaterial will'be fact that the web is fashioned from felt, and

also owing to thefact that the web is porous. Owing to the pprosity of the web, ,both theupper and lower faces of the material will be subjected to the same atmospheric pres sure, the web exerting no suction, action, When the material to'themandreh This operation takes place by reason of the fact that the inaudrel fll is not porous. The atmospheric pressure against the outerface of the material will serve to hold the samcagainst' the mandrel, there being no counteracting atmospheric pressure against the inner face of the ma, terial, since the mandrel. is not porous. When the mandrel 31. is rotated, the sheet of material will be wound about the mandrel, forming a tube consisting ofa plurality of convolutions, and since the tube is a multiplv structure, defective places in, the materialwill not be likely to come into registration, as the'material is wound about the mandrel.

The drive is as follows :-Fror'n the drive shaft 33, motion is transmitted through the :eow ow nundrelis rotated. The tension of the drive rain 47 may be adjusted by shifting the lever in the manner hereinbetore described.- The weights 1? actuate the lever 14: and cause a rotation of the shaft 143, the pioions l4" meshing into the rack bars 14, the shaft 18 being moved transversely and the roller 19 being thrust against the Web 20, to maintain the some sufficiently tent to up hold the mandrel 31, it being possible to adjust the tension of the Web by iucreusingor decreasing the number of the Weights 17. By, manipulating the lever 26, the shaft 22 may be rocked, actuating the arm 27 and causing a. depression of the roller. 29 so that the roller eng'zrges the mandrel. 31 and thrusts the mandrel against the web 20, thus causing a depression of the Web between the rollers 11 and 19,.

wkttention is directed to the fact that so soon the lever 2 lieve the pressure'of the roller upon the niinid-rel 81, the mondrel end the finished tube will travel with. the Web toward the rear end of the frame 1 and ultimately pass bit the rearfind of the "frame.

It frequently happens that the mandrel 31 becomes bowed or sprung, and due to rough handling and other ceuses, the-outer face of the mandrel may not present atruly cylindrical surface. If a detective mendrel be rotated upon a fixed axis, it is in1-- possible to maintain a fixed pressure upon the material when the some is wound upon the mandrel, since themendrel "Will. move eccentrics-Hy about its of rotation. In

the ziuzichine herein disclosed, the use of detective mandrel will have no efiect upon the product, rince the mandrel cradled (to fleet? us I have termedthe action) upon that portion of the Web :20 which. lies between rollers 11 and The web it 'ill follow the mandrel and press evenly tliereeguirist, even though the outer face or the mandrel is not true, the foregoing be. ing peculihrly obvious when it is recalled that the web is yieldebly tensioned through the ortion of the-levers 14 and at tendant parts. i

Since the materiel. is pressed evenly egi'zinst the rumidrel 31 tl'iroughout the entire Width of the materia t wre'W-ill be no trapping of air lt'etween th volutions of tl1efinislied Lab sequence the tube. will be a oned' air bubbles, it being we l of inipris t Mal-own that is mani mleted toere able over sziid table and said rollers suclibubbles Weaken the tube and often cause a bursting of the tube when the some is; heated. It, is also to be noted that the rollers 11, 12 and29 are so geared together that they travel Lt/i116 same surface speed,

withthe result. that any tendency either to stretch or wrinlde'the sheet of rubber is avoided.- Having thus described the invention, what 3 is claimed is l l. A rubber tube forming lnechinehav ing a yielding carrier for ed with a bight,

a mandrel floating in the bight of the can. r'ler and supported solely thereby, means for driving the carrier, and means, independent, of the carrier, for holding the mandrel. in the bight. and driving itet the same sur face speed as the carrier.

2. A rubber tube forming mechmehaw 111g a porous and yield ng 0311161 termed with a bight, an lIDPQlVlC'lS mandrel floating in the bight of said carrier end'sup ported solely thereby, means for driving. the carrier, and means, independent of the carrier,- for holding said mandrel in. said blght end driving it. et the same surface speed as the carrier.

A, rubber tube forming machine, hevlug spaced rollers, e yielding carrier the? i. A rubber tube forming machine hav ing a table, a pair of spaced carrier rollers adjacent said table, a yielding carrier mow and having a bight between said rollers, e mandrel floating in said bight and supported solely by said carrier, and a flexible faced driving roller, movable into and out of Contact with said mandrel for holding the some in said bight, and driving it at the same surface prising 1 table, a forward carrier roller in speed as said carrier, means for adjusting advance of the table spaced rearward oerrier rollers in rear 0. the table, slower cerrier roller, yielding and extending around all of said rollers and across said table, and having. a bight between said rearward spaced cerrieriollers,

a nmndrel fioeting'inseid bight and supported solely by said carrier on the lower portion only of ts eircumterence, a, softfuced driving roller for holding said mandrel in said big t end-driving it at the same surfers speed eerrier, meehenism for orous carrier nmving said soft-faced roller into and out of Iri testimony that I claim the foregoing engagement with said manZire1 ,mea sforva1 as my own, I have hereto affixed my s1gn aryi ng the pressure of said soft-faced roller ture in the presence of two witnesses.-

on said mandrel, means for adjustingthe FRANKLIN W. KREMER. tension of said carrier, and means for dnv- Vitnesses: .ing all of said carrier rollersiand said driv- FRANK DE VVITT,

ing roller at the same surface speed. C. D. NIXON. 

